Results 11 to 20 of about 12,799 (231)
Analytical Pyrolysis of the Fungal Melanins from Ochroconis spp. Isolated from Lascaux Cave, France
Analytical pyrolysis is a tool widely used for investigating the nature of macromolecules. This technique has been applied with success for solving the chemical structure of geo- and biopolymers.
Cesareo Saiz-Jimenez +3 more
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Influence of ENSO and the urban heat island on climate variation in a growing city of the western Mexico [PDF]
To understand climate change in the local context, it is necessary to analyse three factors in the territories; 1) how temperature and precipitation have varied over time, 2) if there is an association with the natural variation of the planet, for ...
Oyolsi Nájera González +3 more
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Respuesta fisiológica del frijol Phaseolus vulgaris L. a la sequía, en un sistema de raíz dividida.
El objetivo de este trabajo fue estudiar en frijol la regulación de la apertura estomática y si ésta es el resultado de una disminución en el potencial de agua en la parte aérea o de un factor químico producido en la raíz.
J. F. Aguirre +3 more
doaj +1 more source
¿Recursos naturales o bienes comunes naturales?:
En el presente trabajo nos proponemos poner de manifiesto que el término recurso natural, como cualquier producto ideológico, refracta y refleja una realidad que se encuentra más allá de su materialidad. El proceso histórico de generalización de la racionalidad instrumental implicó un cambio radical en las relaciones sociedad-naturaleza.
openaire +3 more sources
The postembryonic development, and life table parameters of the Neoseiulus californicus were studied under laboratory conditions in order to evaluate the potentiality of this depredator for feeding on two phytophages mites Tetranychus desertorum (desert
Víctor Tello Mercado +2 more
doaj +1 more source
Urban expansion constitutes one of the main activities that modify natural environments worldwide; the most vulnerable areas to these effects are peri-urban areas.
Jorge Alberto Escandón-Calderón +4 more
doaj +1 more source
Expansion and contraction of the Engraulis ringens spawning area in northern Chile
Many studies have considered the temporal patterns of reproduction of Engraulis ringens, but little attention has been given to the spatial patterns of reproduction (spawning areas), which have shown great variability in both location (geographical ...
Paola Moreno, Gabriel Claramunt
doaj +1 more source
Background Weeping lovegrass (Eragrostis curvula [Shrad.] Nees) is a perennial grass found in semi-arid regions that is well adapted for growth in sandy soils and drought conditions. E.
Ingrid Garbus +6 more
doaj +1 more source
Usos tradicionales y prácticas de manejo de Piper auritum en comunidades maya rurales de Yucatán
Background: Plant domestication is a continuous, multidirectional process that is directed via plant selection and management. In the current study we use Piper auritum, an aromatic plant frequently used in Mexican cuisine and for medicinal purpose, to ...
Rosa Pérez-Hernández +5 more
doaj +1 more source
Recursos naturales y conflicto
La producción de palma africana ejemplifica una de las más claras tendencias mundiales de cambios en el comercio: primero, la prioridad no es la producción de alimentos, en tanto no se produce comida y, en segundo lugar, el campesino, sujeto cultural, social y político tradicional del proceso productivo, es completamente desplazado (Molano, 2012).El ...
Rosalvina Otálora Cortés +1 more
openaire +2 more sources

